When I ordered these I wasn't aware that not all weights fit all gimbals. But I was lucky, these did. The problem is that once you put the weight in, you can't get it in the closed position because the weights are in the way. Luckily they have a pretty thin body and my gimble closes perfectly in its original position. They come with 9 small gears to balance fairly heavy phones (I have a Samsung Note 9S Plus) with a case (I have a Moments case for Moments lenses) and extra lenses (I have Moments lenses).